Natural Alluvial Gold-Bearing Specimen
Raw Gold (Nugget/Ore Fragment) · Natural Yellow Gold with iron/sulfide oxidation and host rock matrix inclusions.
Purity: Estimated 75% to 92% (18K to 22K) within mineral matrix. Natural gold typically contains silver and copper impurities.
Type
Raw Gold (Nugget/Ore Fragment)
Purity
Estimated 75% to 92% (18K to 22K) within mineral matrix. Natural gold typically contains silver and copper impurities.
Gold Type
Natural Yellow Gold with iron/sulfide oxidation and host rock matrix inclusions.
Weight
2 to 4 grams total weight; gold mass fraction likely significantly lower than total weight.
Description
A natural, water-worn gold-bearing nugget or mineral specimen. The item displays characteristic alluvial rounding from river travel, with visible metallic luster amidst a darker mineral matrix, likely ironstones or quartz.
Key Features
High density for its size, irregularly distributed metallic flecks, and a heavy patina of host rock minerals.
Color & Finish
Dull brassy yellow flecks against a dark gray, brown, and black mineralized surface; natural unpolished river-worn finish.
Hallmarks & Stamps
None; natural geological specimens do not carry stamps or hallmarks.
Dimensions Estimate
Approximately 12mm x 10mm x 6mm; fits comfortably within a fingertip.
Gemstones & Inlays
None; natural quartz or sulfide mineral attachments may be present in the matrix.
Clasp & Closure
None; raw geological sample.
Chain & Links
None; natural rounded alluvial shape indicates water-worn transportation.
Craftsmanship Details
N/A; naturally formed via hydrothermal activity and shaped by geological erosion and hydraulic transport.
Authentication Indicators
High specific gravity relative to size, jagged internal grain structure visible in cracks, and lack of 'brassing' or flaking common in fakes.
Origin & Maker
Natural origin; potentially from a riverbed or placer deposit in a gold-bearing region (e.g., California, Alaska, Australia).
Era & Period
Contemporary discovery of a geological object formed over millions of years.
Age Estimate
Geological age of millions of years; recently recovered from the environment based on lack of mounting.
Cultural Significance
Represents the 'Gold Rush' heritage and the primary form of wealth for prospectors throughout history.
Condition Notes
Good; natural weathering and river-tumbling have rounded the edges. Surface displays heavy oxidation and mineral coating typical of raw specimens.
Value Estimate
Melt value is low due to matrix weight; however, as a specimen, it may carry a premium of 10-30% over spot gold price to a collector.
Care & Maintenance
Keep dry; can be cleaned with mild soap and a soft brush. Avoid harsh chemicals that might dissolve the host matrix. Professional ultrasonic cleaning is not recommended for delicate matrix specimens.
Similar Items
Pyrite (Fool's Gold) which is more brittle and has cubic crystal structures; Chalcopyrite which often has a more iridescent peacock-blue tarnish.
Interesting Facts
Most natural gold nuggets are 20K to 23K purity. Only about 2% of the world's gold is found in nugget form; the rest is microscopic.